How Many Paired Comparisons Are Possible Given 9 Stimulus Objects

question 39

Multiple Choice

How many paired comparisons are possible given 9 stimulus objects ?

• A) 54
• B) 48
• C) 36
• D) 45

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Definitions:

Arithmetic Mean

The sum of a collection of numbers divided by the count of numbers in the collection, commonly known as the average.

Midrange

The statistical measure calculated by taking the average of the highest and lowest values in a data set.

Mode

The value that appears most frequently in a data set.

Sample Mean

The average value calculated from a sample, intended to estimate the population mean from which the sample was drawn.